The Efficacy of the Core Knowledge Language Arts Read-Aloud Program in Kindergarten through First Grade Classrooms Study is a multisite cluster randomized control trial of the Core Knowledge Language Arts Read-Aloud Program and its effects on: growth in vocabulary, listening comprehension, and domain knowledge skills from kindergarten through first grade.
Study participants consisted of students and teachers. This project had two separate studies that took place in different states with staggered start dates separated by a year. Each study followed the same procedures and implementation for Year One with Study 2 following the same students for Year 2. Study sites consisted of classrooms nested within schools within one school district for each study. Randomization to condition occurred at the school level after initial student assessments were completed. Teachers and students were assigned to condition based upon their school.
